Acknowledgements: This exhibit is supported by the National
Science Foundation under Grant No. IIS-0238261, CHE-0524661,
IIS-0534909 and IIS-0715303, the James S. McDonnell Foundation;
Thomson Reuters; the Cyberinfrastructure for Network Science Center,
University Information Technology Services, and the School of
Library and Information Science, all three at Indiana University.
Some of the data used to generate the science maps is from the Web
of Science by Thomson Reuters and Scopus by Elsevier. Any opinions,
findings, and conclusions or recommendations expressed in this
material are those of the author(s) and do not necessarily reflect
the views of the National Science Foundation.